Cosmetics Module 4

• True


  TRUE OR FALSE

  Haircare and psyche reciprocally reflect each other both positively and

  negatively (bad hair days).
• Eumelanin


  Gives the brown to black color of the hair
• Pheomelanin


  Gives color from yellow-red to red
• Melanin


  Is a polymer of high molecular weight, insoluble in water and most solvents- Originates frommelanocyteslocated in the basal cell layer of the hair matrix
• Melanocytes


  Specialized cells that produce melanin
• Melanogenesis


  Involves a complex sequence of chemical reactions corresponding to an oxidative polymerization catalyzed by a certain enzyme
• Optical phenomenon


  The color of hair is an ___________________________ attributable to the reflection and refraction of incident light from various interfaces, especially the bulk melanin contained in the cortex
• Elliptical

  General shape of hair fibers
• Fiber diameter


  Resistance to longitudinal deformation, bending and torsion stiffness, and hold of set hair are related to _____________
• False

  TRUE OR FALSE

  A haircut does influence hair growth
• True

  TRUE OR FALSE

  When hair cuticle is weakened it cannot be fully restored. Cosmetic agents may only decrease the abnormal fragility and rough feel of damaged hair
• TRUE


  TRUE OR FALSE

  Activities such as perming, bleaching, and permanent dying damages the integrity of hair cuticle making it vulnerable to mechanical abrasion
• False


  TRUE OR FALSE

  Tight rollers and tight hairstyles does not contribute to the possibility of temporary hair loss
• True

  TRUE OR FALSE

  Continued or prolonged use of tight rollers and tight hairstyles may contribute to permanent hair loss or hair thinning
• False


  TRUE OR FALSE

  Antidandruff, preshaves, and aftershave lotions is not intended to be in contact with the skin
• False


  TRUE OR FALSE

  Dyes and hair bleach are intended to be in contact with the skin